Oil well bailer



Mardi 20, 1945. ,1 D, JQHNSTQN 2,371,824

OIL WELL BAILER Filed Sept. 20, 1941 3 Sheets-Sheet 1 f March 20, 1945. J, D. JQHNSTQN 2,371,824

OIL WELL BAILER Filed Sept. 20, 1941 {5;Sheets-Sheet 2 IN V EN TOR.

ATTDRNEYE Marh 20, 1945.

J. D. JOHNSTON OIL WELL BAILER Filed Sept. 20, 1941 3 Shee'ts-Sheet 3 Patentes Mar. zo, 1945 UNITED STAT-EsI PATENT OFFICE OIL WELL BAILER James D. Johnston, Smackover, Ark. Application September 20, 1941, Serial No. 411,742

(Cl. 16S-19) 3 Claims.

Figure 3 is a sectional view along the line 3-3 of Figure 2;

Figure 4 is a sectional view along the line 4-4 of Figure 2;

Figure 5 is an enlarged sectional view of the lower end of the pump structure of Figure 1;

Figure 6 is a sectional view along the line 6-6 of Figure 5;

Figure 7 is a sectional and elevational view of connector parts for detachably connecting the inlet valve structure with the lower end of the Pump;

Figure 8 is a view illustrating a latch for the parts of Figure '1;

Figure 9 is a sectional view illustrating the latch in its open lposition;

Figure l0 is a sectional view of the latch in a released position;

Figure 11 is a top plan view of the inlet valve;

Figure 12 is an enlarged longitudinal sectional view of a portion of the pump structure;

Figure 13 is a sectional view along the line |3|3 of Figure 12;

Figure 14 is a longitudinal sectional view of the telescopic parts of the modified pump structure;

Figure 15' is a partial sectional view of a connector for the pump cable;

Figure 16 is a sectional view of a different form of connector; and

Figure 17 is an elevational view of the connector of Figure 16.

In the embodiment selected for illustration, I make use of a cage 20 having a threaded shank 22 to which is threadedly connected an eye 24 for connection with the rope or cable employed in manipulating the pump in the well casing. Inside the cage 20 is mounted a ball valve 26 normally lying on a seat 28 formed on one end of a sleeve 30. This sleeve is provided with a iiange 32 secured between an internal flange 34 of the cage 20 and the end of a threaded tubular neck 36 formed on a cap or connector member 38 having a longitudinal bore 40 communicating with the cage through the medium of the sleeve 30.

An outside tube 42 is welded at 44 to a bushing nut 46 threadedly connected at 48 with the cap 38. At the lower end of the cap 38 is formed a shank -50 of smaller diameter than the inside diameter of the bushing nut 46 to provide an annular space 52 having communication with the bore 40 through the medium of ports 54.

threaded bore 56 is provided in the lower end of the shank 50 for connection with a threaded stem 58 formed on the upper end of a rod 60. The rod 60 extends through a ring 62 secured to the upper end of an inside tube 64 having telescopic relationship with the tube 42. The ring may be secured to the tube 64 by pins 66, and the inside diameter of the ring is such as to provide an annular space 68 about the rod 60. To the lower end of the rod 60 is secured a head 'I0 freely slidable in the tube 64 and arranged to engage the ring 62 upon predetermined elevation of the tube 42 with respect to the tube 64.

The lower end of the tube 64 is welded at 12 to a sleeve 14. Pins 16 may also be used for connecting the tube and the sleeve. A valve unit 18 is carried by the lower end of the sleeve 14. This unit comprises a sleeve 80, see Figure` 5, welded at 82 to the tube 14. A tubular bottom member 84 is threadedly connected at 86 with the sleeve and is provided with inlet ports 88 near its bottom end as well as a large bottom opening 90.

A conically shaped valve 82 is located at the upper end of the member 84 and includes two sections 04, each pivotally connected at 96 with the member 84. Figure 5 illustrates the sections 94 in their closed positions, and the sections may pivot upwardly to permit passage of material being pumped to a position above the valve. Bottom member 84 is detachably connected with the sleeve 80. The sleeve is provided with internal threads 98 and longitudinal slots |00 extending ninety degrees circumferentially of the sleeve. Similarly the member 84 is provided with threaded rib-like formations |02 receivable in the grooves |00 when aligned therewith. Thus the member 84 may be connected with the sleeve 80 by pushing the neck |04 into the sleeve 80 and then imparting a ninety degree rotation to the member 84, which brings the threads 98 and |02 to full engagement.

A latch member |06 normally lies in a groove |08 in the member 84 and is pivotally connected tothe latter at H0. The end H2 of the latch member is receivable in a slot I I4 in the sleeve 80 when pvoted to the position of Figure 9 so as to latch the member 8l against accidental rotation' relatively to the sleeve member.

In operation, the bailer is lowered into the well casing and as the member 8d engages the bottom of the well, the outer tube 42 descends downwardly on the inner tube 86, air in the two tubes finding its escape through the cage 2|). -As an upward pull is exerted on the bailer, the outer tube 42 moves upwardly on the inner tube 64, with the result that suction created by reason of the relative movement between the two tubes causes the material to rise in the bailer.

The head 10 engages the ring 62 for lifting the tube 64 from the well. With the head 'l0 lying in engagement with the ring 62, the lower end of the tube 42 lies above openings ||5 in the inner tube 34.

With the loaded bailer elevated to the surface,

the bailer is unloaded by detaching the bottom member B4 from the sleeve 80, the uncovered openings H5 placing the tubular structure of the bailer in communication with the atmosphere so that the material in the inner tube Bil may iiow freely from the bailer.

The valve 92 closes immediately as the lower end of the bailer structure is lifted oil the bottom of the well.

Figure 14 illustrates a bailer in which the outer tube ||6 is provided with two diametrically opposed openings ll. The inner tube |20 is provided with slots |22 so arranged thatat least one slot will always register with at least one opening H8 when the head |24 is brought into engagement with a bushing |26 welded at |28 to the outer tube ||6 and additionally secured thereto by pins |3. Head |28 includes a shank |36 provided with a longitudinal bore |38 normally closed by the ball valve |60 in the cage |42. The head also includes a shank |24 threadedly connected with the inner tube |20, and the shank |36 slides freely in the bushing |26 so that the shank and the cage |42 may pass therethrough as the inner tube |20 descends in the outer tube H6 when the latter strikes bottom. A

The bailer of Figure 14 includes a lower end structure corresponding to that illustrated in Figures 5 through 11. Figure 15 illustrates the cage |42 as being threadedly connected at |45 with an eye |56 to which the manipulating rope is attached. In Figures 16 and 17, a cable |48 is illustrated as being inserted in a socket |50 in a `./connector |52, the connector being provided with ian opening |56 to facilitate application of a solasvnssc dered connection between the cable and the connector. Connector |52 may also be threadedly connected at |58 with a cagell.

Without further elaboration, the foregoing will so fully illustrate my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. VA bailer of the type described comprising telescopically related upper and lower tubes. each tube being of uniform diameter from end to end with one tube tted closely inside the other, an inlet valve at the lower end of the lower tube, an air exhausting valve at the upper end of the upper tube, said upper and lower tubes being of such length and so tted -as to create suction therein when the tubes are extended, the lower tube being provided with openings near its upper end above which the lower end of the upper tube moves when the tubes are fully extended, and a lost motion connection between the upper and lower tubes to lift the lower tube with the upper tube when the tubes are fully extended.

2. A bailer of the type described comprising telescopically related upper and lower tubes, each tube being of uniform diameter from end to end with one tube fitted closely inside the other, an inlet valve at the lower end of the lower tube, an air exhausting valve at the upper end of the upper tube, said upper and lower tubes being of such length and soy tted as to create suction therein when the tubes are extended, a ring fixed within the lower tube, and a rod iixed to the upper tube ,l and provided with a head engageable with the" ring for lifting the lowertube with the upper tube when the tubes-are fully extended.

3. A bailer of the type described comprising telescopically related upper and lower tubes, each tube being of uniform diameter from end to end with one tube iitted closely inside the other, an inlet valve at the lower end of the lower tube, an air exhausting valve at the upper end of the upper tube, said upper and lower tubes being of such length and so tted as to create suction therein when the tubes are extended, a cap on the upper end of the upper tube constituting a mount for the air exhausting valve, said cap being tubular and provided with air openings, a ring xed within the lower tube, and a rod fixed to the cap provided with a head engageable with the ring for lifting the lower tube with the upper tube when the tubes are fully extended.

- f JAMES D. JOHNSTON. 

